diff options
Diffstat (limited to 'sp/src/public/tier1/fmtstr.h')
| -rw-r--r-- | sp/src/public/tier1/fmtstr.h | 115 |
1 files changed, 114 insertions, 1 deletions
diff --git a/sp/src/public/tier1/fmtstr.h b/sp/src/public/tier1/fmtstr.h index 8c9ccf47..31ee23c7 100644 --- a/sp/src/public/tier1/fmtstr.h +++ b/sp/src/public/tier1/fmtstr.h @@ -125,7 +125,42 @@ public: } void AppendFormatV( const char *pchFormat, va_list args ); - void Append( const char *pchValue ) { AppendFormat( "%s", pchValue ); } + + void Append( const char *pchValue ) + { + // This function is close to the metal to cut down on the CPU cost + // of the previous incantation of Append which was implemented as + // AppendFormat( "%s", pchValue ). This implementation, though not + // as easy to read, instead does a strcpy from the existing end + // point of the CFmtStrN. This brings something like a 10-20x speedup + // in my rudimentary tests. It isn't using V_strncpy because that + // function doesn't return the number of characters copied, which + // we need to adjust m_nLength. Doing the V_strncpy with a V_strlen + // afterwards took twice as long as this implementations in tests, + // so V_strncpy's implementation was used to write this method. + char *pDest = m_szBuf + m_nLength; + const int maxLen = SIZE_BUF - m_nLength; + char *pLast = pDest + maxLen - 1; + while ( (pDest < pLast) && (*pchValue != 0) ) + { + *pDest = *pchValue; + ++pDest; ++pchValue; + } + *pDest = 0; + m_nLength = pDest - m_szBuf; + } + + //optimized version of append for just adding a single character + void Append( char ch ) + { + if( m_nLength < SIZE_BUF - 1 ) + { + m_szBuf[ m_nLength ] = ch; + m_nLength++; + m_szBuf[ m_nLength ] = '\0'; + } + } + void AppendIndent( uint32 unCount, char chIndent = '\t' ); protected: @@ -193,6 +228,84 @@ typedef CFmtStrQuietTruncationN<FMTSTR_STD_LEN> CFmtStrQuietTruncation; typedef CFmtStrN<1024> CFmtStr1024; typedef CFmtStrN<8192> CFmtStrMax; + +//----------------------------------------------------------------------------- +// Purpose: Fast-path number-to-string helper (with optional quoting) +// Derived off of the Steam CNumStr but with a few tweaks, such as +// trimming off the in-our-cases-unnecessary strlen calls (by not +// storing the length in the class). +//----------------------------------------------------------------------------- + +class CNumStr +{ +public: + CNumStr() { m_szBuf[0] = 0; } + + explicit CNumStr( bool b ) { SetBool( b ); } + + explicit CNumStr( int8 n8 ) { SetInt8( n8 ); } + explicit CNumStr( uint8 un8 ) { SetUint8( un8 ); } + explicit CNumStr( int16 n16 ) { SetInt16( n16 ); } + explicit CNumStr( uint16 un16 ) { SetUint16( un16 ); } + explicit CNumStr( int32 n32 ) { SetInt32( n32 ); } + explicit CNumStr( uint32 un32 ) { SetUint32( un32 ); } + explicit CNumStr( int64 n64 ) { SetInt64( n64 ); } + explicit CNumStr( uint64 un64 ) { SetUint64( un64 ); } + +#if defined(COMPILER_GCC) && defined(PLATFORM_64BITS) + explicit CNumStr( lint64 n64 ) { SetInt64( (int64)n64 ); } + explicit CNumStr( ulint64 un64 ) { SetUint64( (uint64)un64 ); } +#endif + + explicit CNumStr( double f ) { SetDouble( f ); } + explicit CNumStr( float f ) { SetFloat( f ); } + + inline void SetBool( bool b ) { Q_memcpy( m_szBuf, b ? "1" : "0", 2 ); } + +#ifdef _WIN32 + inline void SetInt8( int8 n8 ) { _itoa( (int32)n8, m_szBuf, 10 ); } + inline void SetUint8( uint8 un8 ) { _itoa( (int32)un8, m_szBuf, 10 ); } + inline void SetInt16( int16 n16 ) { _itoa( (int32)n16, m_szBuf, 10 ); } + inline void SetUint16( uint16 un16 ) { _itoa( (int32)un16, m_szBuf, 10 ); } + inline void SetInt32( int32 n32 ) { _itoa( n32, m_szBuf, 10 ); } + inline void SetUint32( uint32 un32 ) { _i64toa( (int64)un32, m_szBuf, 10 ); } + inline void SetInt64( int64 n64 ) { _i64toa( n64, m_szBuf, 10 ); } + inline void SetUint64( uint64 un64 ) { _ui64toa( un64, m_szBuf, 10 ); } +#else + inline void SetInt8( int8 n8 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)n8 ); } + inline void SetUint8( uint8 un8 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)un8 ); } + inline void SetInt16( int16 n16 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)n16 ); } + inline void SetUint16( uint16 un16 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)un16 ); } + inline void SetInt32( int32 n32 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", n32 ); } + inline void SetUint32( uint32 un32 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%u", un32 ); } + inline void SetInt64( int64 n64 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%lld", n64 ); } + inline void SetUint64( uint64 un64 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%llu", un64 ); } +#endif + + inline void SetDouble( double f ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%.18g", f ); } + inline void SetFloat( float f ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%.18g", f ); } + + inline void SetHexUint64( uint64 un64 ) { Q_binarytohex( (byte *)&un64, sizeof( un64 ), m_szBuf, sizeof( m_szBuf ) ); } + + operator const char *() const { return m_szBuf; } + const char* String() const { return m_szBuf; } + + void AddQuotes() + { + Assert( m_szBuf[0] != '"' ); + const int nLength = Q_strlen( m_szBuf ); + Q_memmove( m_szBuf + 1, m_szBuf, nLength ); + m_szBuf[0] = '"'; + m_szBuf[nLength + 1] = '"'; + m_szBuf[nLength + 2] = 0; + } + +protected: + char m_szBuf[28]; // long enough to hold 18 digits of precision, a decimal, a - sign, e+### suffix, and quotes + +}; + + //============================================================================= bool BGetLocalFormattedDateAndTime( time_t timeVal, char *pchDate, int cubDate, char *pchTime, int cubTime ); |